Sifting machine



March 4, 1924. 1,485,946 I J. N. BATTENFELD sIFTlfm MACHINE med NEW. 18. 1921 2 Sheets-Sheet 1 is a section on .line 55 Fig. 1; Fig. 6-

Patented Mar. 4, 1924.

UNITED gTATEfi rnraar oeriea.

JOHN N. BATTENFELD, 0F CLEVELAND, OHIO, ASSIGNOR TO JESSE It. BATTENFELD, OF

KANSAS CITY, MISSOURI.

SIFTING MACHINE.

Application filed November 18, 1921.

To all whom it may concern-.-

Be 1t known that I, JoHN N. Bn'r'rmvrnLD, a citizen of the United States. residing at Cleveland, in the county of Cuyahoga This invention relates to sand sifting machines and has particular reference to such machines which are intended for use in connection with molding machines and like structures.

One of the objects of the invention is to provide a power operated sand sifting device, or riddle, so constructed and arranged that it may be readily moved to position above a molding flask.

A further object of the invention is to provide a power operated riddle so constructed that movement of the riddle to the operative position, acts to start the shaking of the riddle, while the act of releasing the riddle will automatically shut off the power and move the riddle to inoperative position.

A specific object of the invention is to provide a power riddle with means which will automatically shut off the power and apply a brake and cause the riddles motion to cease when the operator releases his hold upon the riddle.

A further object of the invention is to provide an adjustable outlet for a power riddle or similar device whereby the area upon which the sand is deposited may be proportioned to suit the size of the container into which the sand is flowing, without reducing the capacity of the riddle.

An additional object of the invention is to provide a centering device for the table of a molding machine so arranged that a sand flask placed on the table may be centered over a riddle.

Further objects will become apparen from the following description taken in connection with the accompanying drawings wherein Fig. 1 is a top plan view of the machine embodying my invention; Fig. 2 is a side elevation of the machine; Fig. 3 is an elevation of the table for. supporting the flask; Fig. 4: is a side elevation of the. machine, the view being taken from an opposite direction from that of Fig. 2; Fig. 5

Serial No. 516,090.

is a section on line 66 Fig. 1; and Fig. 7 is a sectional detail, partly in elevation showing means for adjusting the area of the discharge outlet of the machine.

Referring to the drawings by reference characters, I have shown at 10, a suitable support to which my improved riddle may be secured. A bracket 11 shown as'secured to the support is indicated as provided with spaced bearings 1212 which support a pivot pin 14.

Supported on this pivot pin, I show a. second bracket member 16 having bifurcated ends 17 embracing the pivot pin to have free swinging movement relative to the support 10. It will be'noted that the bracket 16 is provided at its upper end with a. bed or table 19 which may be reenforced by a suitable web 20. Y

Secured upon the upper surface of the table 19, I show a suitable electric motor 21 connected with a suitable source of current. The armature shaft of the motor is indicated as provided with a gear 22'shown as meshing with a similar gear 23 mounted on a shaft 24. This shaft 2 1 carries thereon a brake drum 26 and a crank pin 27 A connecting rod 28 is shown as connected with the crank pin 27 at one end and at the other end to a substantially rectangular frame 30.

The frame 30, it will be noted, is mounted on suitable anti-friction rollers 32, one located at each side and fitted in a slot 33, in the side rails of the frame 35. This frame 35 is shown as secured to a lug 36 on the table 19. The connecting rod28, it will be noted is mounted to move through a suitable aperture 37 in the frame 35.

The connecting rod 28 is provided with a cross head 29 and a block 29 mounted on the cross pin 27 reciprocates in a slot in the cross head. The distance between the ends of the block 29 is less than the width of the slot in the cross head in which it moves. When the motor is operating, the riddle 30 will be given a reciprocating motion and on account of the loose connection described at each limit of movement of the riddle, it will be given a sudden shock, thus causing the sand to be more efiectually sifted.

A. suitable brake member 10 which may be curved to fit the periphery of the brake drum 26 is shown as slidably supported on the top of the table 19. The forward end of this'brake 40 is shown as slotted' at ll; the

slotted portionfbeingi fitted about" a suitable stop member shown as a screw 42. The other end of the brake member is connected by means of 'a'link 4-4 with thebrakelever 45. The brake lever (see Fig. 1) is shown as pivoted at 46 to the top part of the table,

while the end 47 is adapted in one position of the riddle, to coact with a cam48, carried on the bracket, to release the brake. In the other position of the riddle, that is, when it'is removed from the operative position, the end 47 coacts with the curved surface 49 of the bracket thus causing the brake to be moved'against the drum through the action of a spring 50. I

In order thatthe motor may receive current, only, when the riddle is over the molding flask, I have provided acircuit closer, shown in detailin Fig. 6, as comprising a lead member which is stationarily sup portednon" the bracket 11 and acircuitclosing member .56 supported on the swinging table 19. The circuit closing member 56 comprises a spring pressed pin 57 enclosed in suitable case 58 and-adapted to complete the circuit through'the points 59 to the motor...

It will be apparent from the description preceding, that when the operator grasps the riddleby the handle and moves it to position overthe flask, that this act will cause the brake to be removed by the action of the cam 48 on the end of the lever 47 and atthesame time current will be supplied to the motor through the circuit closer 56. This will-cause the motorto operate, and through the gearing 22 and 23 the riddle 30 will reciprocate over the flask and thus cause the sand to be deposited; H

When sufficient sand has been removed, the riddle is moved from the position shown in Fig. l, by swinging it about its pivot 14 and itwill be apparent that this act will cause the end 47 of the lever 45 to move down to the curved portion .49 ofthe bracket; thus causing the spring 50 to move the brake to braking position. 1 The same move ment causes the; circuit to be broken and the motor to cease-operating; 2 I

.In order that the riddle may be removed from-operative position automatically when the operator releases his hold upon it, I may provide-a suitablemeans shown as a cable suitably secured at-71to the tablewhence it passes over the pulleys 72, 3, and 74 to a counter-weight 7 5 whereit is secured. This counter-weight 7 5 is suflicient to move'the riddle away from position as soon as the operator releases his hold upon it,

In-nrder that t e ri e. .s y be adapted to deposit sand upon flasks of different size without, waste, I have provided :a novelform offioutlet so constructed that the discharge area of the riddle may be varied at will. The means "shown for acconiplishmeas re ing this purpose comprises a" plurality of spout'forming aprons 76 hinged as at 77 to the riddle frame. Suitable adjusting screws 78 are shown as threaded through supportingbars 79 secured on the riddle frame. These adjusting screws 7 8 may be provided witha pin 80 shown as adapted to move in the slot 81 in alug 82 secured to an apron 76. From the description, it will be apparent that when a change in the area of the riddle is desired, the operation of the adjusting screws 7 8 will ca-use the aprons to move inwardly and thus define a pouring spout of thedesired size. p

It is quite necessary that the flask be prop erly centered with respe'ctto the riddleand for. this purpose, I provide upon the flask table a pair of L -shaped members Whichare slidably secured as bymeans of a bolt 92 to a. U-shaped bracket93.' This U- shaped bracket .93 is slotted as at 94 and through the slot a bolt 95 extends. It will thus be app aren't'that the L shap'edni'enibers 9 1 may be moved transversely of the frame by loosening the bolt 95. and may bemoved longitudinally by loosening the bolt '92: so

that any proper adjustment may be made anld thereby cause the flask to centerprop ery..,.

From the foregoing description, it will "be apparent that I. have invented an improved sand riddle which is'highly efficient and which ispositiv'e'in its operation and can be economically made. v

Having thus described my invention, I claim:: v

1. In a power. riddle, a frame to support the riddle, means'to move the riddle to operative position, power means mountedfonthe frame for operating the riddle, and means whereby the operation ofi'noving the riddle to position automatically causes the power means to operate. 7

v2. In a. powcr,riddle, aipivotal support for the riddle allowing 'ittof swinghorizon tally {cooperative position, po'wernieansffor op era tlnjg the riddle; means wherebythejafct of moving the. riddle to operative position causes the: power means to operate, and yielding means. to ummaucaii 'remm the riddle to inactive position. I p I V f- In pews?" ri e. m an ol'is r the riddle, means tomove' the' to operative position, a motor for operatingjihe riddle, means" whereby the" oper'a tion' of moving the riddle to position supplies current, to the motor" and massin automati cally return theriddleto'inaotive position.

a .32, we" iddle; a to sen-last a.

power means to cease functioning when the riddle is moved from operative position.

5. In a power riddle, means to support the riddle, means to move the riddle to operative position power means for operating the riddle, means whereby the act of moving the riddle to operative position removes a brake and causes the riddle to begin operating, said last means serving when the riddle is moved from the operatlve position to cause the operating means to cease functioning and to apply the brake.

6. In a power riddle, a supporting member, a table pivoted thereto, a motor carried by said table, a frame carried by said table, a riddle slidably mounted in said frame, and connections between said motor and said riddle whereby the latter may be reciprocated, and means for moving the riddle away from its operative position when not in use.

7. In a device of the character described,

the combination of a riddle, a spout device 8. In a power riddle, a supporting mem ber, a table pivoted thereto, a motor carried by said table, a drive shaft driven by said motor, a brake drum on said shaft, a crank pin on said drum, a frame carried by said table, a riddle slidably mounted in said frame, and connections between said crank 1 pin and said riddle whereby the latter may be reciprocated.

In testimony-whereof, I hereunto aifix my 40 signature.

JOHN N. BATTENFELD. 

